php通用图片处理类的用法

2020-03-22 19:22:24
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这篇文章主要介绍了php实现的通用图片处理类,可实现针对图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下：
该图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色，处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步。在一些需要图片高级处理功能的Web应用中，可以参考这个类。
 ?phphtml' target='_blank'>class picture var $PICTURE_URL;//要处理的图片 var $DEST_URL= temp__01.jpg //生成目标图片位置 var $PICTURE_CREATE;//要创建的图片 var $TURE_COLOR;//新建一个真彩图象 var $PICTURE_WIDTH;//原图片宽度 var $PICTURE_HEIGHT;//原图片高度水印的类型，默认的为水印文字 var $MARK_TYPE=1; var $WORD;//经过UTF-8后的文字 var $WORD_X;//文字横坐标 var $WORD_Y;//文字纵坐标 var $FONT_TYPE;//字体类型 var $FONT_SIZE= 12 //字体大小 var $FONT_WORD;//文字 var $ANGLE=0;//文字的角度，默认为0 var $FONT_COLOR= #000000 //文字颜色 var $FONT_PATH= font/simkai.ttf //字体库，默认为宋体 var $FORCE_URL;//水印图片 var $FORCE_X=0;//水印横坐标 var $FORCE_Y=0;//水印纵坐标 var $FORCE_START_X=0;//切起水印的图片横坐标 var $FORCE_START_Y=0;//切起水印的图片纵坐标 var $PICTURE_TYPE;//图片类型 var $PICTURE_MIME;//输出的头部缩放比例为1的话就按缩放高度和宽度缩放 var $ZOOM=1;//缩放类型 var $ZOOM_MULTIPLE;//缩放比例 var $ZOOM_WIDTH;//缩放宽度 var $ZOOM_HEIGHT;//缩放高度裁切，按比例和固定长度、宽度 var $CUT_TYPE=1;//裁切类型 var $CUT_X=0;//裁切的横坐标 var $CUT_Y=0;//裁切的纵坐标 var $CUT_;//裁切的宽度 var $CUT_HEIGHT=100;//裁切的高度 var $SHARP= 7.0 //锐化程度透明度处理 var $ALPHA= 100 //透明度在0-127之间 var $ALPHA_X= 90  var $ALPHA_Y= 50 任意角度旋转 var $CIRCUMROTATE= 90.0 //注意，必须为浮点数 var $ERROR=array( unalviable = 没有找到相关图片! 构造函数：函数初始化 function __construct($PICTURE_URL) $this- get_info($PICTURE_URL); function get_info($PICTURE_URL) 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息 @$SIZE=getimagesize($PICTURE_URL); if(!$SIZE) exit($this- ERROR[ unalviable  //得到原图片的信息类型、宽度、高度 $this- PICTURE_MIME=$SIZE[ mime  $this- PICTURE_; $this- PICTURE_HEIGHT=$SIZE[1]; //创建图片 switch($SIZE[2]) case 1: $this- PICTURE_CREATE=imagecreatefromgif($PICTURE_URL); $this- PICTURE_TYPE= imagejpeg  $this- PICTURE_EXT= jpg  break; case 2: $this- PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL); $this- PICTURE_TYPE= imagegif  $this- PICTURE_EXT= gif  break; case 3: $this- PICTURE_CREATE=imagecreatefrompng($PICTURE_URL); $this- PICTURE_TYPE= imagepng  $this- PICTURE_EXT= png  break; 文字颜色转换16进制转换成10进制 preg_match_all( /([0-f]){2,2}/i ,$this- FONT_COLOR,$MATCHES); if(count($MATCHES)==3) $this- RED=hexdec($MATCHES[0][0]); $this- GREEN=hexdec($MATCHES[0][1]); $this- BLUE=hexdec($MATCHES[0][2]); //end of __construct 将16进制的颜色转换成10进制的（R，G，B） function hex2dec() preg_match_all( /([0-f]){2,2}/i ,$this- FONT_COLOR,$MATCHES); if(count($MATCHES)==3) $this- RED=hexdec($MATCHES[0][0]); $this- GREEN=hexdec($MATCHES[0][1]); $this- BLUE=hexdec($MATCHES[0][2]); //缩放类型 function zoom_type($ZOOM_TYPE) $this- ZOOM=$ZOOM_TYPE; //对图片进行缩放,如果不指定高度和宽度就进行缩放 function zoom() //缩放的大小 if($this- ZOOM==0) $this- ZOOM_;gt;PICTURE_WIDTH * $this- ZOOM_MULTIPLE; $this- ZOOM_HEIGHT=$this- PICTURE_HEIGHT * $this- ZOOM_MULTIPLE; //新建一个真彩图象 $this- TRUE_COLOR=imagecreatetruecolor($this- ZOOM_WIDTH,$this- ZOOM_HEIGHT); $WHITE=imagecolorallocate($this- TRUE_COLOR,255,255,255); imagefilledrectangle($this- TRUE_COLOR,0,0,$this- ZOOM_WIDTH,$this- ZOOM_HEIGHT,$WHITE); imagecopyresized($this- TRUE_COLOR,$this- PICTURE_CREATE,0,0,0,0,$this- ZOOM_WIDTH,$this- ZOOM_HEIGHT,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); //end of zoom //裁切图片,按坐标或自动 function cut() $this- TRUE_COLOR=imagecreatetruecolor($this- CUT_WIDTH,$this- CUT_WIDTH); imagecopy($this- TRUE_COLOR,$this- PICTURE_CREATE, 0, 0, $this- CUT_X, $this- CUT_Y,$this- CUT_WIDTH,$this- CUT_HEIGHT); //end of cut 在图片上放文字或图片 水印文字 function _mark_text() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $this- WORD=mb_convert_encoding($this- FONT_WORD, utf-8 , gb2312  取得使用 TrueType 字体的文本的范围 $TEMP = imagettfbbox($this- FONT_SIZE,0,$this- FONT_PATH,$this- WORD); $WORD_LENGTH=strlen($this- WORD); $WORD_WIDTH =$TEMP[2] - $TEMP[6]; $WORD_HEIGHT =$TEMP[3] - $TEMP[7]; 文字水印的默认位置为右下角 if($this- WORD_X== ) $this- WORD_X=$this- PICTURE_WIDTH-$WORD_WIDTH; if($this- WORD_Y== ) $this- WORD_Y=$this- PICTURE_HEIGHT-$WORD_HEIGHT; imagesettile($this- TRUE_COLOR,$this- PICTURE_CREATE); imagefilledrectangle($this- TRUE_COLOR,0,0,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT,IMG_COLOR_TILED); $TEXT2=imagecolorallocate($this- TRUE_COLOR,$this- RED,$this- GREEN,$this- Blue); imagettftext($this- TRUE_COLOR,$this- FONT_SIZE,$this- ANGLE,$this- WORD_X,$this- WORD_Y,$TEXT2,$this- FONT_PATH,$this- WORD); 水印图片function _mark_picture() 获取水印图片的信息 @$SIZE=getimagesize($this- FORCE_URL); if(!$SIZE) exit($this- ERROR[ unalviable  $FORCE_PICTURE_; $FORCE_PICTURE_HEIGHT=$SIZE[1]; //创建水印图片 switch($SIZE[2]) case 1: $FORCE_PICTURE_CREATE=imagecreatefromgif($this- FORCE_URL); $FORCE_PICTURE_TYPE= gif  break; case 2: $FORCE_PICTURE_CREATE=imagecreatefromjpeg($this- FORCE_URL); $FORCE_PICTURE_TYPE= jpg  break; case 3: $FORCE_PICTURE_CREATE=imagecreatefrompng($this- FORCE_URL); $FORCE_PICTURE_TYPE= png  break; 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。 $this- NEW_PICTURE=$this- PICTURE_CREATE; if($FORCE_PICTURE_WIDTH $this- PICTURE_WIDTH) $CREATE_;gt;FORCE_START_X; else $CREATE_;gt;PICTURE_WIDTH; if($FORCE_PICTURE_HEIGHT $this- PICTURE_HEIGHT) $CREATE_HEIGHT=$FORCE_PICTURE_HEIGHT-$this- FORCE_START_Y; else $CREATE_HEIGHT=$this- PICTURE_HEIGHT; 创建一个画布 $NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT); $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255); 将背景图拷贝到画布中 imagecopy($NEW_PICTURE_CREATE, $this- PICTURE_CREATE, 0, 0, 0, 0,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); 将目标图片拷贝到背景图片上 imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this- FORCE_X, $this- FORCE_Y, $this- FORCE_START_X, $this- FORCE_START_Y,$FORCE_PICTURE_WIDTH,$FORCE_PICTURE_HEIGHT); $this- TRUE_COLOR=$NEW_PICTURE_CREATE;//end of markfunction alpha_() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $rgb= #CDCDCD  $tran_color= #000000  for($j=0;$j =$this- PICTURE_HEIGHT-1;$j++) for ($i=0;$i =$this- PICTURE_WIDTH-1;$i++) $rgb = imagecolorat($this- PICTURE_CREATE,$i,$j); $r = ($rgb 16) 0xFF; $g = ($rgb 8) 0xFF; $b = $rgb 0xFF; $now_color=imagecolorallocate($this- PICTURE_CREATE,$r,$g,$b); if ($now_color==$tran_color) continue; else $color=imagecolorallocatealpha($this- PICTURE_CREATE,$r,$g,$b,$ALPHA); imagesetpixel($this- PICTURE_CREATE,$ALPHA_X+$i,$ALPHA_Y+$j,$color); $this- TRUE_COLOR=$this- PICTURE_CREATE;图片旋转:沿y轴旋转function turn_y() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); for ($x = 0; $x $this- PICTURE_WIDTH; $x++) imagecopy($this- TRUE_COLOR, $this- PICTURE_CREATE, $this- PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this- PICTURE_HEIGHT);沿X轴旋转function turn_x() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); for ($y = 0; $y $this- PICTURE_HEIGHT; $y++) imagecopy($this- TRUE_COLOR, $this- PICTURE_CREATE, 0, $this- PICTURE_HEIGHT - $y - 1, 0, $y, $this- PICTURE_WIDTH, 1);任意角度旋转function turn() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); imageCopyResized($this- TRUE_COLOR,$this- PICTURE_CREATE,0,0,0,0,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $WHITE=imagecolorallocate($this- TRUE_COLOR,255,255,255); $this- TRUE_COLOR=imagerotate ($this- TRUE_COLOR, $this- CIRCUMROTATE, $WHITE);function sharp() $this- TRUE_COLOR=imagecreatetruecolor($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $cnt=0; for ($x=0; $x $this- PICTURE_WIDTH; $x++) for ($y=0; $y $this- PICTURE_HEIGHT; $y++) $src_clr1 = imagecolorsforindex($this- TRUE_COLOR, imagecolorat($this- PICTURE_CREATE, $x-1, $y-1)); $src_clr2 = imagecolorsforindex($this- TRUE_COLOR, imagecolorat($this- PICTURE_CREATE, $x, $y)); $r = intval($src_clr2[ red ]+$this- SHARP*($src_clr2[ red ]-$src_clr1[ red ])); $g = intval($src_clr2[ green ]+$this- SHARP*($src_clr2[ green ]-$src_clr1[ green ])); $b = intval($src_clr2[ blue ]+$this- SHARP*($src_clr2[ blue ]-$src_clr1[ blue ])); $r = min(255, max($r, 0)); $g = min(255, max($g, 0)); $b = min(255, max($b, 0)); if (($DST_CLR=imagecolorexact($this- PICTURE_CREATE, $r, $g, $b))==-1) $DST_CLR = imagecolorallocate($this- PICTURE_CREATE, $r, $g, $b); $cnt++; if ($DST_CLR==-1) die( color allocate faile at $x, $y ($cnt).  imagesetpixel($this- TRUE_COLOR, $x, $y, $DST_CLR); 将图片反色处理??function return_color() 创建一个画布 $NEW_PICTURE_CREATE=imagecreate($this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255); 将背景图拷贝到画布中 imagecopy($NEW_PICTURE_CREATE, $this- PICTURE_CREATE, 0, 0, 0, 0,$this- PICTURE_WIDTH,$this- PICTURE_HEIGHT); $this- TRUE_COLOR=$NEW_PICTURE_CREATE;生成目标图片并显示function show() // 判断浏览器,若是IE就不发送头 if(isset($_SERVER[ HTTP_USER_AGENT ])) $ua = strtoupper($_SERVER[ HTTP_USER_AGENT  if(!preg_match( /^.*MSIE.*/)$/i ,$ua)) header( Content-type:$this- PICTURE_MIME  $OUT=$this- PICTURE_TYPE; $OUT($this- TRUE_COLOR);生成目标图片并保存function save_picture() // 以 JPEG 格式将图像输出到浏览器或文件 $OUT=$this- PICTURE_TYPE; if(function_exists($OUT)) // 判断浏览器,若是IE就不发送头 if(isset($_SERVER[ HTTP_USER_AGENT ])) $ua = strtoupper($_SERVER[ HTTP_USER_AGENT  if(!preg_match( /^.*MSIE.*/)$/i ,$ua)) header( Content-type:$this- PICTURE_MIME  if(!$this- TRUE_COLOR) exit($this- ERROR[ unavilable  else $OUT($this- TRUE_COLOR,$this- DEST_URL); $OUT($this- TRUE_COLOR);析构函数：释放图片function __destruct()/*释放图片*/ imagedestroy($this- TRUE_COLOR); imagedestroy($this- PICTURE_CREATE);//end of class?
总结：以上就是本篇文的全部内容，希望能对大家的学习有所帮助。